/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.polardbx.executor.operator.util.bloomfilter;

import com.alibaba.polardbx.optimizer.chunk.Chunk;
import com.alibaba.polardbx.util.bloomfilter.TddlHasher;

/**
 * @author bairui.lrj
 * @since
 */
public class BloomFilterConsumeFilter {
    private final BloomFilterConsume bloomFilterConsume;
    private TddlHasher hasher;

    public BloomFilterConsumeFilter(BloomFilterConsume bloomFilterConsume) {
        this.bloomFilterConsume = bloomFilterConsume;
    }

    public boolean filter(Chunk.ChunkRow row) {
        // Build condition (boolean) block
        boolean bfilter = false;

        if (bloomFilterConsume.getBloomFilter() != null) {
            if (hasher == null) {
                hasher = bloomFilterConsume.getBloomFilter().newHasher();
            }
            bfilter = !bloomFilterConsume.getBloomFilter()
                .mightContain(row.hashCode(hasher, bloomFilterConsume.getHashKeys()));
        }
        return bfilter;
    }
}
